“There is only one rule in comedy: You don’t steal jokes.” says Eric Gruber, host of the Mostly Normal Show at the Hollywood Improv Lab. Gruber at his own show outed former comedian Jason Garrett who stole, with no change in phrasing or performance, jokes from late comedian Mitch Mullany. It’s the only rule that, as a comedian, you absolutely cannot break. There are plenty of rules and guidelines to